Login wallpaper

Discussion in 'PowerPC Macs' started by jrsx, Jan 30, 2014.

  1. jrsx macrumors 65816

    jrsx

    Joined:
    Nov 2, 2013
    Location:
    Tacoma, Washington
    #1
    I am trying to change my login wallpaper from the default Leopard wallpaper, but when I replace the Leopard wallpaper in the Library folder in System, I log out and just get a blank blue wallpaper. Putting the Leopard one back works, though. I clicked on a terminal command in the same folder called "UserAccountUpdater", and it said "login windows passed the wrong number of arguments: 0, we require 4". How can I change the login wallpaper successfully? Also, the "UserAccountUpdater" seems always to have that same message, so I'm not sure it's supposed to be that way or not. Thanks, -jrsx
     
  2. RedCroissant Suspended

    Joined:
    Aug 13, 2011
    #2
    Are you replacing it with a picture that you've named "DefaultDesktop"? If not, then that's what you need to do first.
     
  3. jrsx thread starter macrumors 65816

    jrsx

    Joined:
    Nov 2, 2013
    Location:
    Tacoma, Washington
    #3
    Yes. I named it "DefaultDesktop", but it still doesn't work.
     
  4. micahgartman macrumors member

    micahgartman

    Joined:
    Feb 22, 2005
    Location:
    Houston, TX, USA
    #4
    Verify that your new background is an RGB JPEG (as opposed to a CMYK JPEG) with 8 bits per channel.
     
  5. jrsx thread starter macrumors 65816

    jrsx

    Joined:
    Nov 2, 2013
    Location:
    Tacoma, Washington
  6. eyoungren macrumors P6

    eyoungren

    Joined:
    Aug 31, 2011
    Location:
    Phoenix • 85037
    #6
    RGB. (R)ed, (G)reen, (B)lue. This is the color profile that all monitors (starting with CRTs) and many inkjet printers of whatever type use. It's additive, meaning color mixing begins with black and ends with white; as more color is added, the result is lighter and tends to white.

    RGB is the color space used for images on the internet and for most uses on computers.

    CMYK. (C)yan, (M)agenta, (Y)ellow, Blac(K). This is the color profile that most printing presses use. It's subtractive, meaning that one begins with white and ends with black; as one adds color, the result gets darker and tends to black

    CMYK is what you see when you read a magazine or a newspaper.

    Each is good for it's own use but bad to use in the other medium. CMYK cannot be displayed on monitors because monitors use RGB. It can be simulated, but RGB is used to simulate it.

    Conversely, RGB used in the printing process tends to wash out and look very light colored.

    So what's being said here is for you to check your JPG to see if it's using the RGB color model or the CMYK color model. If it's CMYK it won't display on your RGB monitor.
     
  7. micahgartman macrumors member

    micahgartman

    Joined:
    Feb 22, 2005
    Location:
    Houston, TX, USA

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